There's still other semi-public seeds available which haven't been banned. AFAIK only this 1 seed was banned. If Nintendo supposedly can tell when several people are using the same seed, then their actions aren't really showing that.

There's already malicious tweaks outside of the main Cydia sources. There could be some in the main sources but low chance. If you research what you install you won't have any issues. No respected jailbreak dev would dirty up their name releasing anything malicious.

You basically start off in the enemies subway station, they could have defenders there so watch out. Move up to the main hub and there's more defenders. They don't respawn once dead. You can break their Kill Coin and (blue flame..?) machines to steal some of their resources. All while you're on a 2 or 3 minute timer. You can also kidnap one of their Haters and keep them for yourself. If you have the space in your restrooms.

I had a bug where a silver chest took all my magic keys and refused to open. Also there weren't any collection points in the map, think it was the scrapyard exploration. Restarting the app fixed it but I still lost the keys.